A:
Positive:
1 x 283086055 x 566172113 x 217758565 x 435517491 x 57655887 x 319152455 x 115314435 x 6383
Negative:
-1 x -28308605-5 x -5661721-13 x -2177585-65 x -435517-491 x -57655-887 x -31915-2455 x -11531-4435 x -6383
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 28,308,605, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 28,308,605 | |
| -1 | -28,308,605 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,308,605.
Example:
1 x 28,308,605 = 28,308,605
and
-1 x -28,308,605 = 28,308,605
Notice both answers equal 28,308,605
With that explanation out of the way, let's continue. Next, we take the number 28,308,605 and divide it by 2:
28,308,605 ÷ 2 = 14,154,302.5
If the quotient is a whole number, then 2 and 14,154,302.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 28,308,605 | |
| -1 | -28,308,605 |
Now, we try dividing 28,308,605 by 3:
28,308,605 ÷ 3 = 9,436,201.6667
If the quotient is a whole number, then 3 and 9,436,201.6667 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 28,308,605 | |
| -1 | -28,308,605 |
Let's try dividing by 4:
28,308,605 ÷ 4 = 7,077,151.25
If the quotient is a whole number, then 4 and 7,077,151.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 28,308,605 | |
| -1 | 28,308,605 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 491 | 887 | 2,455 | 4,435 | 6,383 | 11,531 | 31,915 | 57,655 | 435,517 | 2,177,585 | 5,661,721 | 28,308,605 |
| -1 | -5 | -13 | -65 | -491 | -887 | -2,455 | -4,435 | -6,383 | -11,531 | -31,915 | -57,655 | -435,517 | -2,177,585 | -5,661,721 | -28,308,605 |
Here are some more numbers to try:
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